Improved JPEG based GPS picture compression
نویسنده
چکیده
Pictures used by GPS devices are usually overly large to be stored as Bit Map, so they are by and large compressed. The common compression method is JPEG; however JPEG assumes that the average color of beginning of each blocks line is usually similar to the average color of end of its preceding blocks line. Many times this assumption is incorrect for GPS picture. This paper suggests a way to change this method to an improved method that is more suitable for JPEG based GPS images.
منابع مشابه
Enhancement of JPEG Compression for GPS Images
GPS devices typically make use of images that are excessively large to be stored as a Bit Map, so the images are always compressed. The widespread compression technique is JPEG; however JPEG has a disadvantage – JPEG assumes that the average color of beginning of each blocks line is commonly similar to the average color of end of its preceding blocks line. Almost always this assumption is wrong...
متن کاملارائه روشی برای پیش‌پردازش تصویر جهت بهبود عملکرد JPEG
A lot of researchs have been performed in image compression and different methods have been proposed. Each of the existing methods presents different compression rates on various images. By identifing the effective parameters in a compression algorithm and strengthen them in the preprocessing stage, the compression rate of the algorithm can be improved. JPEG is one of the successful compression...
متن کاملKnowledge-based approach to JPEG acceleration
JPEG picture compression and related algorithms are not only used in still picture compression, but also to a growing degree for moving picture compression in telecommunication applications. Real-time JPEG compression and decompression are crucial in these scenarios. We present a method to significantly improve the performance of software based JPEG decompression. Key to these performance gains...
متن کاملUsing H.264/avc-intra for Dct Based Segmentation Driven Compound Image Compression
This paper presents a one pass block classification algorithm for efficient coding of compound images which consists of multimedia elements like text, graphics and natural images. The objective is to minimize the loss of visual quality of text during compression by separating text information which needs high special resolution than the pictures and background. It segments computer screen image...
متن کاملComparison of Jpeg Image Coders
In this paper we report results from our comparative study of JPEG and JPEG2000 image coders using two image quality measures: Peak Signal to Noise Ratio (PSNR) as traditional objective picture quality measure, and Picture Quality Scale as perception based quantitative picture quality measure. Coders are evaluated in ratedistortion sense. The influences of different image contents and compressi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2015